2
$\begingroup$

I'm currently working with the band structure of graphene and graphene-like compounds.

α-Boron Nitride (hexagonal, single layer) has many interesting properties. I was wondering if the next period analogue, a hexagonal single-layered Aluminium Phosphide existed. Wikipedia lists this compound, but it seems to only be found with a multilayered sphalerite structure.

Does an allotrope of AlP exist (in a stable state at normal conditions) where the structure is similar to graphene or silicene? If not, why?

$\endgroup$
1
  • $\begingroup$ (I'm pretty confident that it doesn't exist, so the why is what I'm actually interested in) $\endgroup$ Jun 14, 2013 at 11:10

1 Answer 1

3
$\begingroup$

I suspect that it does not. As far as I know, all trivalent phosphorous is highly pyramidal--or at least not planar. This would rule out any graphene-like structure.

The reasoning that I have seen is based on hybridization. In the second row (third period) the 3s and 3p atomic orbitals are well separated, implying that s and p can not mix and that the outer valence is unhybridized. If bonding is with unhybridized p's, then bonding would occur at right angles.

(Kutzelnigg, W. Angew. Chem., Int. Ed. Engl. 1984, 23, 272.)

(Brown, E. Organometallics 2000, 19, 2208-2214.)

$\endgroup$
0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.